Chimney vent



'Dec. 20, 1932. l, WOOLF CHIMNEY VENT Filed Dec. 12, 1930 gwwmioz Patented Dec. 20, 1932 UNITED STATES ISAAC WOOLF, OF PROVIDENCE, RHODE ISLAND CHIMNEY VENT Application filed December 12, 1930. Serial No. 501,981.

The present invention relates to a chimney vent for the purpose of drawing out smoke and preventing back draft and also the entrance of water.

The main object of the invention is the construction of a vent which is practical in construction and effective in operation.

Another object of the invention is generally to improve the construction of chimney vents.

The preferred embodiment of the invention is illustrated in the accompanying drawing in which:

Fig. 1 is a sectional view of the invention and a portion of the chimney on which it is mounted; and

Fig. 2 is a perspective view of the vent.

As here shown the vent embodying the present invention is constructed preferably of sheet metal and comprises a central flue 10 which tapers gradually from the open bottom thereof to the closed top at which side outlets 11 and 12 are provided in communication with side fiues 13 and 14. The side outlets merge with the upper end of the cen- 7 tral flue and with said side flues along upwardly and downwardly extending curved lines forming restricted passageways between said central flue and the side fines. The side flues 13 and 14 are open at both ends.

The central flue 10 comprises a front wall 15, a rear wall 16, and side walls 17 and 18 joined at their meeting edges in any suitable way. The front and rear walls have lateral extensions 19 and 20 which project outwardly and also upwardly and downwardly along inner downwardly extending curved lines 21 and upwardly extending curved lines 22 terminating in vertical outer edges23. As shown, said side walls of the central flue are all of fiat sheet metal.

The flat sheet metal side walls 17 and 18 have curved downwardly refiexed portions 24 and 25, which are connected to the inner edges of the lateral extensions 19 and 20. A curved top wall 26 of flat sheet metal is secured to the upper edges 27 of the front and rear walls 15 and 16 of the central flue and to the curved edges 22 by any suitable means, closing the top of the central flue and form ing portions of the upper side Walls of the side fines 13 and 14. The outer side walls of the flues 13 and 14 are formed, by fiat plates 28 and 29 secured to the edges 23 of the lateral extensions 19 and 20 respectively.

The bottom of the front, rear and side walls The vent herein disclosed has been found to operate very effectively in withdrawing smoke, while preventing the passage of water into the chimney, and also preventing back draft. The upwardly tapering central flue, the side flues, and the passages which 1 merge gradually along curved lines with both the central and side fines not only prevents the accumulation of back pressure in the vent but also increases the rate of flow of the smoke through the vent. It is apparent that the construction of the vent is simple and practical as it comprises only a few parts requiring but simple stamping and bending operations, and the assembly of these parts is likewise a simple matter. sider the specific construction shown and described preferable, although it will be under stood that, since certain changes may be made without departing from the invention, I do not wish to be limited to the construction i illustrated except as required by the appended claim and the prior art.

What I claim is:

A chimney vent comprising a central flue having flat sheet metal front, rear, and side walls tapering gradually from the bottom toward the top, said front and rear walls having integral lateral extensions projecting outwardly, said extensions also projecting upwardly and downwardly, said side walls having integral upper downwardly reflexed curved portions connected to the downwardly projecting portions of said lateral extensions, a flat sheet metal top wall connected to the upper ends of said front and rear walls and .J

I therefore con- 1..

to the upwardly projecting portions of said lateral extensions thereof, and flat sheet metal side walls connected to the vertical edges of said lateral extensions forming side 5 lines therewith open at the top and bottom. In testimony whereof I hereunto aflix my signature.

ISAAC WOOLF. 

